Apparatus and methods for speech analysis

Details Apparatus and methods for speech analysis Apparatus and methods for speech analysis

1986-11-07

1989-02-28

Wong, Peter S.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 36, 381 45, 3645135, G10L 500

Patent

active

048093319

ABSTRACT:
Input signals representative of speech are unreliable as inputs for speech recognition if processed conventionally by, among other processes, filtering into separate frequency bands. Further processing according to the invention takes the output from a filter bank and after operations of rectification and integration provides a process of median filtering and smoothing which significantly reduces the sampling rate of the filtered signals while retaining the important acoustic features of the input speech.

REFERENCES:
patent: 4389540 (1983-06-01), Nakamura et al.
patent: 4464782 (1984-08-01), Beraud et al.
patent: 4538234 (1985-08-01), Honda et al.
patent: 4574392 (1986-03-01), Reiss
patent: 4622680 (1986-11-01), Zinser

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